The check used for the Alaska Purchase, issued on August 1, 1868, and signed by US Secretary of State William H. Seward. For a total of $7.2 million, the United States government purchased Russian America from the Russian Empire (represented here by Russian Minister to the United States Eduard de Stoeckl). The lands involved became the modern state of Alaska in 1959.Check: William H. Seward; scan: Our Documents initiative